1.The exine is composed of tectum, columellae, foot layer and endexine.
花粉壁由顶盖层、柱状层、底层及壁层所组成。
2.The exine of pollen wall is of different electron density, the nexine dense and the sexine, comprising tectum, bacules, and foot layer, relatively thin.
花粉壁的壁分层和层，层包括覆盖层、基粒棒和基足层等三层，层只包含一层。
3.(1)微型月季花粉具有3个萌发孔，极三裂圆形；
Different cultivars showed different exine sculpture and fringes, luminas and verrucate.
壁由顶盖层、柱状层、底层及
层所组成。
壁;
容亦不代表本软件的
点；若发现问题，欢迎向我们指正。
三裂圆形；
